an instrument for cutting, consisting essentially of a thin, sharp-edged, metal blade fitted with a handle.

a knifelike weapon; dagger or short sword.

any blade for cutting, as in a tool or machine.

to apply a knife to; cut, stab, etc., with a knife.

to attempt to defeat or undermine in a secret or underhanded way.

to move or cleave through something with or as if with a knife

The ship knifed through the heavy seas.

under the knife

in surgery; undergoing a medical operation

The patient was under the knife for four hours.

noun

bayonet , blade , bolo , cutlass , cutter , cutting edge , dagger , edge , lance , lancet , machete , point , ripper , sabre , scalpel , scimitar , scythe , shank , shiv , sickle , skewer , skiver , steel , stiletto , switchblade , sword , tickler

verb

brand , carve , chop down , clip , cut , hurt , impale , jag , kill , lacerate , lance , open up , pierce , shank , shiv , slash , slice , spit , stick , thrust , wound , blade , stab , sword , tool , utensil , weapon